Improved run.sh, additional stop.sh and bumped genesis block timestamp in blockchain.json

stop.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo 'Calling GET /admin/stop on local Qortal node'
+if curl --url http://localhost:12391/admin/stop 1>/dev/null 2>&1; then
+	echo "Qortal node responded and should be shutting down"
+	exit 0
+else
+	echo "No response from Qortal node - not running?"
+	exit 1
+fi